KeywordToken returns the token associated with the given keyword string, or ILLEGAL if given name is not a keyword.

NewLexer creates a new lexer that will tokenize the given source code.

Unescape unescapes the backslash escapes in s (which shouldn't include the surrounding quotes) and returns the unquoted string.

Not really a token, but used as an operator.

Lexer tokenizes a byte string of AWK source code.

Position stores the source line and column where a token starts.

Token is the type of a single token.